Journal ArticleDOI
High-Speed Railway Communications: From GSM-R to LTE-R
Ruisi He,Bo Ai,Gongpu Wang,Ke Guan,Zhangdui Zhong,Andreas F. Molisch,Cesar Briso-Rodriguez,Claude Oestges +7 more
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TLDR
To handle increasing traffic, ensure passenger safety, and provide real-time multimedia information, a new communication system for HSR is required to replace the current GSM-railway (GSM-R) technology with the next-generation railway-dedicated communication system providing improved capacity and capability.Abstract:
High-speed railways (HSRs) improve the quality of rail services, yield greater customer satisfaction, and help to create socioeconomically balanced societies [1]. This highly efficient transport mode creates significant challenges in terms of investment, technology, industry, and environment. To handle increasing traffic, ensure passenger safety, and provide real-time multimedia information, a new communication system for HSR is required. In the last decade, public networks have been evolving from voice-centric second-generation systems, e.g., Global System for Mobile Communications (GSM) with limited capabilities, to fourth-generation (4G) broad-band systems that offer higher data rates, e.g., long-term evolution (LTE). It is thus relevant for HSR to replace the current GSM-railway (GSM-R) technology with the next-generation railway-dedicated communication system providing improved capacity and capability.read more
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5G Key Technologies for Smart Railways
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Journal ArticleDOI
Towards the Internet of Smart Trains: A Review on Industrial IoT-Connected Railways
TL;DR: The aim of this article is to provide a detailed examination of the state-of-the-art of different technologies and services that will revolutionize the railway industry and will allow for confronting today challenges.
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Classification Framework for Free Space Optical Communication Links and Systems
TL;DR: A multi-level classification framework to classify existing and future indoor, terrestrial, space, underwater, and heterogenous FSO links and systems using common and simple unified notation is proposed and used to review existing standards and recommendations in the field of FSO.
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Energy Efficiency Optimization for NOMA UAV Network With Imperfect CSI
TL;DR: This work focuses on system performance optimization in non-orthogonal multiple access (NOMA) UAV network considering imperfect CSI between the UAV and users and proves that the proposed algorithm is effective compared with existing resource allocation schemes.
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Internet of Things-Based Online Condition Monitor and Improved Adaptive Fuzzy Control for a Medium-Low-Speed Maglev Train System
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References
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Journal ArticleDOI
Challenges Toward Wireless Communications for High-Speed Railway
Bo Ai,Xiang Cheng,Thomas Kurner,Zhangdui Zhong,Ke Guan,Ruisi He,Lei Xiong,David W. Matolak,David G. Michelson,Cesar Briso-Rodriguez +9 more
TL;DR: This work discusses in detail the main differences in scientific research for wireless communications between the HSR operation scenarios and the conventional public land mobile scenarios, and the latest research progress in wireless channel modeling in viaducts, cuttings, and tunnels scenarios.
Journal ArticleDOI
Maximizing MIMO Capacity in Sparse Multipath With Reconfigurable Antenna Arrays
TL;DR: A model for sparse multipath channels is proposed and it is shown that sparse channels afford a new dimension over which capacity can be optimized: the distribution or configuration of the sparse statistically independent degrees of freedom (DoF) in the available spatial signal space dimensions.
Proceedings ArticleDOI
Broadband wireless communications on high speed trains
TL;DR: This tutorial paper provides a comprehensive overview on the recent development in broadband wireless communications for high speed trains, starting with the introduction of the two-hop network structure, radio-over-fiber (RoF) based cell planning is described in detail.
Journal ArticleDOI
Properties of mobile radio propagation above 400 MHz
TL;DR: In this article, the spatial description of the field impinging upon a mobile radio antenna is derived and the power spectrum and other properties of the signal envelope are considered, and large scale variations of the average signal are discussed.
Journal ArticleDOI
Downlink transmission of broadband OFCDM Systems-part II: effect of Doppler shift
TL;DR: This paper focuses on the investigation of the effect of Doppler shift on the downlink transmission of high-speed mobile OFCDM systems and proposes Hybrid MCI cancellation and minimum mean-square error (MMSE) detection proposed by the authors as an efficient way to eliminate the MCI in the frequency domain.